So how does this work?
F2F1
4F52
44FF
F422
F= Flag, #= number on the tile. By the way, the only thing that doesn't have the number fulfilled on it is the 5... :/
The last level glitches at the point when you go through a tunnel and you've gotta drop the spikes on them.. Most of the time, it gets stuck on the edge.
{/0"00"10"20"30#=0#@1&A0"B0"G0#K1.L0"Q0#V2.W2.[0#]30^0#_0#`0#a0#c0#e0#g00h0#i0#j0#k0#m0#o0#r0"s0%u0"v0"w0"x0Ay0)~%(!2$~+655?0@0I2JGKGS+T+U+}
It's hard, but definitely not IMPOSSIBLE.